public void Username_Duplicated() { var userFirst = testCtx.UserAuthentications.First(); var userLast = testCtx.UserAuthentications.Last(); userFirst.Username = un; userLast.Username = un; testCtx.SaveChanges(); var result = uManager.AddPasswordAsync(new NuApplicationUser(un), pwd).Result; Assert.IsFalse(result.Succeeded); Assert.AreEqual(result.Errors.Count(), 1); Assert.AreEqual(AppMessages.DuplicateUsername(un), result.Errors.First().Description); }